고랭지 임의⋅불법 경작지 복구 시나리오에 따른 토양유실 및부유사량 저감 효과 분석

초록

This study assessed the efficiency of reducing soil erosion and suspended sediment through the restoration of alpine unauthorized and illegally cultivatedfields, using the SWAT (Soil and Water Assessment Tool) model in the Mandae District. The results showed that in Scenario 5, which involvedrestoring unauthorized and illegal fields within forests, along rivers (banks), and in ditch areas were restored to their original land categories, achievedthe highest efficiency in reducing average annual soil erosion and suspended sediment, with reductions of 8.1% and 4.5%, respecti vely. I n particular,it was confirmed that the restoration of unauthorized and illegal fields within forested areas has a significant impact. This demonstrated that therestoration of unauthorized and illegal agricultural fields can substantially reduce the soil erosion and suspended sediment attributable to non-point sourcepollution. Our findings highlight the importance of managing these unauthorized and illegal agricultural activities in developing sustainable strategieswithin non-point source pollution management areas. This study is expected to provide important basic data to effectively establish water qualityimprovement strategies in the region of non-point source pollution management.

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